TOKYO- Toshiba Corporation (TOKYO:6502) today announced that high performance train propulsion systems that it has delivered to Keikyu Corporation entered service today on Keikyu’s new Series Shin 1000 train. The propulsion system comprises Toshiba’s advanced totally enclosed permanent magnet synchronous motors (PMSM) and 4-in-1 variable-voltage, variable-frequency (VVVF) traction inverters.
Toshiba delivered two sets of the propulsion systems for a new six-car train. This is Keikyu's first use of totally enclosed PMSMs made by Toshiba. Keikyu awarded the order to Toshiba because of the high reliability of its propulsion systems and the proven performance of totally enclosed PMSMs.
The PMSM's unchallenged benefits include a rated energy efficiency of 97%. The motor's totally enclosed design eliminates the need for cleaning during its service life and minimizes maintenance, and its 4-in-1 VVVF inverter system, which integrates two 4-in-1 inverter units, each of which has 4 inverter circuits cooled by only 1 cooling unit, is smaller and lighter than the typical systems now in use. Perhaps most important, the propulsion system uses 30% to 50% less power than Toshiba's preceding system*1, as the inverter system can drive up to eight PMSMs, significantly reducing traction power consumption*2, and Toshiba's proprietary control system for regenerative braking*3 harvests more energy and boosts the overall efficiency of the trains. The propulsion systems delivered to Keikyu were designed and standardized to meet the performance requirements of various types of trains.
Toshiba's totally enclosed PMSM and VVVF traction inverters are already deployed on Hankyu Corporation's Series 1000 trains, Kyushu Railway Company''s Series 305 trains and Hanshin Electric Railway Company's Series 5700 trains. The system is also in service in Asia.
Toshiba will continue to develop products with higher energy efficiency and lower life-cycle costs and thereby contribute to the global railroad transportation that combines environmental friendliness and passenger comfort.
Image of Toshiba’s Totally Enclosed PMSM
4-in-1 Inverter System
New Shin 1000 Series Train
Toshiba Corporation, a Fortune Global 500 company, channels world-class capabilities in advanced electronic and electrical product and systems into five strategic business domains: Energy & Infrastructure, Community Solutions, Healthcare Systems & Services, Electronic Devices & Components, and Lifestyles Products & Services. Guided by the principles of The Basic Commitment of the Toshiba Group, “Committed to People, Committed to the Future”, Toshiba promotes global operations and is contributing to the .realization of a world where generations to come can live better lives.
Founded in Tokyo in 1875, today’s Toshiba is at the heart of a global network of over 580 consolidated companies employing 199,000 people worldwide, with annual sales surpassing 6.6 trillion yen (US$55 billion).
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